Go to the "Hardcore" settings for one of the following games. Select the "New" or "Super" version of that game and begin game play. Quit the game, and the "New" or "Super" version of that game will now appear at the arcade game selection menu.
Dig Dug II
Xevious
Tower Of Druaga
Galaga
Mappy
Pac-Man
Galaxian
Dig Dug II: Classic version
Select "Dig Dug II" at the "Arcade" menu. Tap the touch screen or press L + Start to display the menu. Select "Settings (2)" then go to "Hardcore Options". Tap "New Version" and change it to "Old Version". Return to the "Arcade" menu to access the classic version of Dig Dug II.
Secret Game
Go to Xevious, then press Settings (2). Hit "Hardcore Options", and hit Xevious Version. Choose "Super Xevious", and touch "Confirm".You will now be able to choose Super Xevious from the arcade and Score Attack menus. Super Xevious is a more difficult version of Xevious that was originally given a limited release.